google/beltino: add libgfxinit support

Tested on Zako variant

Change-Id: I433863b34731584797456eee6c2d270868a4f13f
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37208
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/beltino/Kconfig

@@ -10,6 +10,7 @@ config BOARD_GOOGLE_BASEBOARD_BELTINO
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME
 	select MAINBOARD_HAS_CHROMEOS
+	select MAINBOARD_HAS_LIBGFXINIT
 	select MAINBOARD_HAS_LPC_TPM
 	select MAINBOARD_HAS_TPM1
 

src/mainboard/google/beltino/Makefile.inc

@@ -22,5 +22,7 @@ smm-y += smihandler.c variants/$(VARIANT_DIR)/led.c
 
 romstage-y += variants/$(VARIANT_DIR)/led.c
 
+ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+
 subdirs-y += variants/$(VARIANT_DIR)
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include

src/mainboard/google/beltino/gma-mainboard.ads

@@ -0,0 +1,30 @@
+--
+-- This file is part of the coreboot project.
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+
+with HW.GFX.GMA;
+with HW.GFX.GMA.Display_Probing;
+
+use HW.GFX.GMA;
+use HW.GFX.GMA.Display_Probing;
+
+private package GMA.Mainboard is
+
+   ports : constant Port_List :=
+     (HDMI1,
+      HDMI2,
+      DP1,
+      DP2,
+      others => Disabled);
+
+end GMA.Mainboard;